Wagner, Roy
University of Chicago, 1986
Buku Teks
Danesi, Marcel, 1946-, author
Indiana University Press, 1999
Buku Teks
Chevalier, Jean, author
Blakwell, 1994
Buku Referensi
Eberhard, Wolfram, 1909-1989, author
St Edmundsbury Press, 1996
Buku Teks
Chiron Publications, 1993
Buku Referensi